1. Metropolitan Council Environmental Services A Clean Water Agency Presented to the Environment Committee November 9, 2010 Information Item Master Water Supply Plan: Current & Future Activities Keith Buttleman, Assistant General Manager, Environmental Quality Assurance Lanya Ross, Senior Environmental Scientist, Water Supply Planning

2. Purpose Provide an update on the implementation of the Master Water Supply Plan (approved March 2010) Legislative update Current and future projects Report to Legislature outline

3. 2010 Legislative Session $400,000 from Clean Water Fund – FY 11 Specific projects required –Plume mapping –Glacial aquifer mapping –Stormwater Reuse –Seminary Fen and Valley Branch Trout Stream Expanded Advisory Committee –Wright, Sherburne, Isanti and Chisago Counties Report to Legislature on outcomes required –January 15, 2011

4. 2011 Water Supply Initiative $1,000,000 from Clean Water Fund – FY 12/13 Part of state agency package Supported by Clean Water Council recommendations

5. Plan Implementation DNR appropriation permit and water supply approvals consistent with Master Plan Local and regional technical studies –Surface water and groundwater interaction –Coordinated water supply and wastewater planning –Aquifer vulnerability* –Water re-use* and conservation –Natural resource protection* *Legislative requirement

6. Surface and Groundwater Interaction Over 100,000 surface waters analyzed: 52% are disconnected from the regional groundwater system 30% recharge aquifers 16% receive and discharge groundwater 2% are supported by upwelling groundwater

7. East Bethel Purpose: Align water supply planning and sewer service expansion Evaluate land use, water, and sewer planning Develop a local groundwater flow model Recommend targeted data collection to verify model predictions of surface water and municipal well impacts

8. Plume Mapping* Purpose: Create map library of known groundwater contaminant plumes Inform land use and water supply planning –Stormwater infiltration BMPs –Well siting Site prioritization: –High growth communities –Vulnerable drinking water supply management areas –Pilot project area to demonstrate value to planning *Legislative requirement

9. Aquifer Vulnerability* Purpose: Metro-wide map of glacial sediment vertical permeability (informs recharge rate and flow paths) Synthesize multiple MDH & DNR methods used to evaluate aquifer vulnerability Incorporate new data: –Geologic mapping of glacial materials –Hydrogeochemical database –Contaminant plume information *Legislative requirement

10. Stormwater Reuse* Purpose: Develop plans for stormwater re-use in metro communities –Reduce demands on drinking water supplies –Reduce mass loading of pollutants to surface water Provide guidelines for communities –Collection, treatment, storage, and distribution options –Capital and O&M cost estimates –Matrix-type comparison/feasibility assessment tools –Conceptual plans *Legislative requirement

11. Water Conservation Program Evaluation* Purpose: Methodology to evaluate potential savings to cities and customers from water conservation programs Deliverables –Inventory of water conservation programs appropriate for the Twin Cities metropolitan area –Tool to evaluate how selected conservation programs affect future water demand –Tool to develop a rate structure that generates adequate O & M revenue while achieving conservation *Legislative requirement

12. Seminary Fen* Purpose: Protect Seminary Fen while meeting projected water demand Work group established – Chanhassen, Chaska, DNR, Lower Minnesota Watershed District, Carver County Activities –Assemble existing data and information –Evaluate adequacy of current monitoring –Characterize hydrology –Develop management objectives and criteria *Legislative requirement

13. Valley Branch Trout Stream* Purpose: Protect Valley Branch Trout Stream Woodbury monitoring wells and stream Woodbury and Cottage Grove have initiated discussions about reuse of remediation pump- out water Comprehensive management plan may be most effective approach *Legislative requirement

14. Future Projects Evaluation of water use and conservation effectiveness Local assessments –Western Scott County –Northeast Metro Water quality impacts of stormwater infiltration Metro Model recalibration and scenario development

15. Report to 2011 Legislature Overview of the Master Plan –Goals –Components –Implementation process How the Council’s water supply planning relates to the state’s sustainable water strategy Activities funded by Clean Water Fund Other anticipated future activities

16. Questions?

17. Master Plan Update  Metro Model 2  Community Profiles  Guidance Comprehensive Planning (Water Supply Plans) Support Current Stakeholder Needs Ongoing Activities  Information collection and analysis  Tool development